FSR 1609

(MWSC 2034)

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0.19 UTI
0.0
CN
0.07
Cdens
0.25
CC3
0.31
Clit
1.0
Cdup
Radius (P>50% members) 6.0 [arcmin]
  • CN 0.0 Sparse
  • Cdens 0.07 Very loose
  • CC3 0.25 Low quality
  • Clit 0.31 Poorly studied
  • Cdup 1.0 Unique

Overview

FSR 1609 is a sparse, very loose object of low C3 quality. Its parallax locates it at a moderate distance, well above the mid-plane, affected by low extinction. It is catalogued as a massive, old cluster (see Parameters). It is poorly studied in the literature.

⚠️ Warning: the low UTI value and no obvious signs of duplication (Cdup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Distant Low extinction Massive Old

Data

Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 186.982 -48.48 0.217 -8.739 -1.099 -18.444
Just et al. 2023 186.959 -48.472
Bica et al. 2019 186.975 -48.458
Kharchenko et al. 2016 186.959 -48.472
Kharchenko et al. 2013 186.967 -48.475 -9.9 3.17
Froebrich et al. 2007 186.971 -48.458

💡 Note: The UCC values are estimated from its identified members.

Reference Year Dist [kpc] Av [mag] DAv [mag] Age [Myr] [Fe/H] [dex] Mass [Msun] Bfr BSS
Just et al. 2023 2239 1968
Kharchenko et al. 2016 4.47 0.00 2239
Kharchenko et al. 2013 4.47 0.00 2239

💡 Note: The parameters are sometimes transformed from their original values to match the format of the columns shown here, see FAQ. The columns DAv, Bfr, BSS correspond to differential extinction, binary fraction, and blue stragglers, respectively. BSS values can be listed as fractions or integers.

Visualization

Galactocentric position diagram

💡 Note: How are the galactocentric plots generated? See FAQ.